Will not accept more than 1GB RAM??

I'm a tech repair and have stumpled upon a problem I havent seen before.
It is probably just the laptop that has a faulty motherboard but Im asking anyway.

The problem is that the laptop has one 1GB DDR2 SODIMM Kingston RAM and the client wants to upgrade it to 2GB.
However when I put another 1GB RAM in the computer starts and shows the bios startscreen for 1-3 seconds and then restarts over and over again.
Nothing is wrong with the RAMs (have tested with many).
I have tried these configurations: (none worked)
2x 1GB
1x 1GB + 512MB
1x 2GB

It doesnt seem to be that one RAM socket is bad, have tried the 1GB ram in both socked, works fine.

Any help appreciated.

Laptop info:
Toshiba Satellite Pro A100'
Intel Celeron M 1.4GHz
1x 1GB DDR2 Kingston RAM
Windows XP Professional
cybergenieAsked:
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alikaz3Connect With a Mentor Commented:
Is this the exact system you are using?:
http://crucial.com/store/listparts.aspx?model=Satellite%20A100-S8111TD%20(Intel%20Celeron%20M%20Processors)

If it is, the site says it takes 2 X 1GB sticks as the maximum
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Andres PeralesConnect With a Mentor Commented:
are both ram sticks exactly the same brand, model, speed, and the such?  I would start there, and two can the board actually take 2 gb of ram?  When you inserted the new ram have you booted into the BIOS to check configuration there?

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rindiConnect With a Mentor Commented:
According to the following site, that PC only supports RAM with a specific chip type:

http://www.4allmemory.com/index.cfm?fuseaction=search.memorySearch&model_id=60821
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alikaz3Commented:
And I agree with rindi
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cybergenieAuthor Commented:
Hi and thanks for your comments.

Firstly I only tried with DDR2 SODIMM 800MHz RAM. (and yes they were exactly the same type)

I have since then tried with all the lower (speed) types of DDR2.

Tried BIOS update and so on.

The computer won't startup for long enough to let me go into BIOS.

I'm sure there is something wrong with the motherboard so I will close this thread now and share the points.
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